Dusty-nv inference, how to skip frame in mp4?

AK51 · August 1, 2022, 3:45am

Hi,

If I used dusty-nv object detection (with many addon code), the web cam can skip frame and the display is smooth.
But if I use mp4 instead, the output video is slow because it captures every frame. How can I skip the mp4 frame?

Plan B is to create a mp4 with lower fps.

Thx

AastaLLL · August 1, 2022, 6:09am

Hi,

There is a framerate option in the video source of jetson-inference.
Please give it a check.

github.com

dusty-nv/jetson-utils/blob/56d57f6713a5afe9029ab768ec5d13c285a52dfb/video/videoOptions.h#L70


      
          	 * This option can be set from the command line using `--input-height=N`
          	 * for videoSource streams, or `--output-height=N` for videoOutput streams.
          	 */
          	uint32_t height;	
          
          
	/**
          	 * The framerate of the stream (the default is 30Hz).
          	 * This option can be set from the command line using `--input-rate=N` or `--output-rate=N`
          	 * for input and output streams, respectively. The `--framerate=N` option sets it for both.
          	 */
          	float frameRate;
          	
          	/**
          	 * The encoding bitrate for compressed streams (only applies to video codecs like H264/H265).
          	 * For videoOutput streams, this option can be set from the command line using `--bitrate=N`.
          	 * @note the default bitrate for encoding output streams is 4Mbps (target VBR).
          	 */
          	uint32_t bitRate;
          
          
	/**
          	 * The number of ring buffers used for threading.

Thanks.

AK51 · August 2, 2022, 6:48am

I have tried
video-viewer --framerate=1 1.mp4
video-viewer --frameRate=1 1.mp4
and
video-viewer --input-rate=1 --output-rate=1 1.mp4
All do not work…

I can see in thermal
–height: 1080
–frameRate: 1.000000
…
But the video is smooth, does not feel like 1fps. Thx

AK51 · August 4, 2022, 1:59pm

Don’t worry, I use AGX instead of Nano. Problem solved.
Cheers.

system · August 24, 2022, 4:30am

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